Home / 52.21-78.15-47.22

Finding the Fourth Proportional to 52.21, 78.15 and 47.22

Calculator

Solution

The fourth proportional to 52.21, 78.15 and 47.22 is: 70.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.21 : 78.15 = 47.22 : x
  2. Step 2: Convert to fraction form
    52.21/78.15 = 47.22/x
  3. Step 3: Cross multiply
    52.21x = 78.15 × 47.22
  4. Step 4: Simplify right side
    52.21x = 3,690.01
  5. Step 5: Solve for x
    x = 3,690.01/52.21
  6. Step 6: Final answer
    x = 70.68

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.